Crossword Genius

Testing stage (4)

Ross

I believe the answer is:

beta

'testing stage' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for beta that I've seen before include "Second-class" , "Greek character - not quite top-notch" , "final test" , "Second highest grade of mark" , "software under test" .)

I've seen this clue in the New York Times, the Newsday, the Wall Street Journal, the L.A. Times Daily and the Newsday.com.
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